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प्रश्न
Classify the following as physical or chemical change :
Growth of a plant
पर्याय
Physical change
Chemical change
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उत्तर
Growth of plant – Chemical change
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संबंधित प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
Tick the most appropriate answer.
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- heat energy.
- wind energy
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- sound energy
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
Classify the following as a physical or a chemical change.
Butter getting rancid
Define a chemical change. Give two examples of the above changes.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
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If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
